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r600/sb: Avoid causing an exception when getting the reciprocal of 0u.

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I'm not sure what the hardware would return in this circumstance, so just
don't fold it.  Avoids regressions on transition to NIR.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14319>
This commit is contained in:
Emma Anholt 2022-02-11 13:06:47 -08:00 • committed by Marge Bot
parent 25836895f3
commit 0879c15666
1 changed files with 7 additions and 2 deletions
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9
src/gallium/drivers/r600/sb/sb_expr.cpp
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@ -459,8 +459,13 @@ bool expr_handler::fold_alu_op1(alu_node& n) {
case ALU_OP1_RECIP_FF:
case ALU_OP1_RECIP_IEEE: dv = 1.0f / cv.f; break;
// case ALU_OP1_RECIP_INT:
case ALU_OP1_RECIP_UINT: dv.u = (1ull << 32) / cv.u; break;
// case ALU_OP1_RNDNE: dv = floor(cv.f + 0.5f); break;
case ALU_OP1_RECIP_UINT: {
if (!cv.u)
return false;
dv.u = (1ull << 32) / cv.u;
break;
}
// case ALU_OP1_RNDNE: dv = floor(cv.f + 0.5f); break;
case ALU_OP1_SIN: dv = sin(cv.f * 2.0f * M_PI); break;
case ALU_OP1_SQRT_IEEE: dv = sqrtf(cv.f); break;
case ALU_OP1_TRUNC: dv = truncf(cv.f); break;